Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Stochastic Cosmology and the Vacuum Energy Parameter

Version 1 : Received: 4 April 2021 / Approved: 6 April 2021 / Online: 6 April 2021 (18:25:00 CEST)

How to cite: Goldfain, E. Stochastic Cosmology and the Vacuum Energy Parameter. Preprints 2021, 2021040184 (doi: 10.20944/preprints202104.0184.v1). Goldfain, E. Stochastic Cosmology and the Vacuum Energy Parameter. Preprints 2021, 2021040184 (doi: 10.20944/preprints202104.0184.v1).

Abstract

The Vacuum Energy Parameter (VEP) of standard cosmology denotes the fraction of the critical density attributed to the accelerated expansion of the Universe. Astrophysical evidence sets the numerical range of VEP at 0.692 +, - 0.012, yet the root cause of these values is currently unknown. Drawing from the stochastic interpretation of early-Universe cosmology, we develop here a derivation of the VEP based on classical diffusion theory and the Langevin equation. Predictions are shown to be in reasonable agreement with observations.

Subject Areas

FRW model; accelerated expansion; Vacuum Energy parameter; stochastic cosmology; Langevin equation

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